You know the little rubber booties on the power tubes??

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Johnny Alien

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They melted right to the tubes. Where can I get more of these for my new tubes?
 
Try the tubedeport or the tubestore. They may have those type of parts.
 
Hi Johnny Alien,

Can you post a picture of what you are talking about?
 
Those rubber things were our attempt at trying to reduce tube rattle, which is always a problem in combos. They were made of a high temperature material but didn't hold up to the 800 -900 degrees of the glass over time, as you can see. We then tried another material that did not melt but still can't mask a rattling tube. It was sort of a failed experiment. The best and only solution is a use tubes that don't rattle. We try to select the best, quietest and most reliable tubes but it is always a challenge to find and maintain them for production. Often they test fine in our electrical and vibration testing and go bad later. I wish we could predict this sort of thing but sadly it is just the nature of all tubes. You can throw away those rubber things.
 
bruce egnater":r90myjzu said:
Those rubber things were our attempt at trying to reduce tube rattle, which is always a problem in combos. They were made of a high temperature material but didn't hold up to the 800 -900 degrees of the glass over time, as you can see. We then tried another material that did not melt but still can't mask a rattling tube. It was sort of a failed experiment. The best and only solution is a use tubes that don't rattle. We try to select the best, quietest and most reliable tubes but it is always a challenge to find and maintain them for production. Often they test fine in our electrical and vibration testing and go bad later. I wish we could predict this sort of thing but sadly it is just the nature of all tubes. You can throw away those rubber things.
Click to expand...

If it makes you feel better, they looked really nice.
 
Same here.
Because it melted, the power tube blew. As well as the fuse. ( Who would have thought I would have to drive 100 miles to get these .315 fuses!! )

So is Bruce recommending we take off the rubber "booties" along with the metal holder and springs? And leave them sort of hanging?

Do they ship them without any of this holding artifact now?

Peace

Julio
 
The rubber thing did NOT cause the tube to blow. If anything, the tube got very hot and melted the rubber thing. Regardless, simply don't use the rubber boots but DO still use the spring clamps. Sorry about the difficulty getting the fuse. They really are not an odd value at all. Where do you live? FYI, a 400mA would work also.
 
Hey Bruce. Thanks for the fast reply.

Yes, I meant my location is odd for the fuses. I live on an island...

As for the tube, well, my logic was, tube gets hot, rubber starts to melt, rubber starts sticking to tube, next time gets hotter and eventually blows.

I've gone thru too many tubes already for the hours its been used.... :(
Such a shame as it does sound great. I would only knock it for being TOO loud. :-)

Peace
 
Did you check/adjust the internal bias when you changed power tubes? you said you have gone through too many tubes so I assue power tubes?
 
Yes I did.
I found the stock power tubes were beginning to too noisy so I ordered 2 new duets. Groove tube.

One of the new 6v6 blew.
I took the rubbers off today. The 6v6 rubbers were extremely melted and took a lot of scraping to remove it.
 
I had a Rebel 30 and removed the rubber isolators and never had a problem. I sold the amp to a friend who's gigged it regularly for two years, without problems. YMMV.
 
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